Sleep in the harp seal ( Pagophilus groenlandica). Peculiarities of sleep in pups during the first month of their lives
SUMMARY Two white‐coated (ten day‐old) and two grey‐spotted (one month‐old) pups of the harp seal were implanted with electrodes for recording the electrocorticograms of the two hemispheres, electrocardiogram, electrooculogram and electromyogram of the neck muscles. In all individuals ECoG slow wave...
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crwiley:10.1111/j.1365-2869.1993.tb00081.x 2024-06-02T08:07:48+00:00 Sleep in the harp seal ( Pagophilus groenlandica). Peculiarities of sleep in pups during the first month of their lives LYAMIN, OLEG I. OLEKSENKO, ALEXANDER I. POLYAKOVA, IRINA G. 1993 http://dx.doi.org/10.1111/j.1365-2869.1993.tb00081.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2869.1993.tb00081.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2869.1993.tb00081.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Sleep Research volume 2, issue 3, page 163-169 ISSN 0962-1105 1365-2869 journal-article 1993 crwiley https://doi.org/10.1111/j.1365-2869.1993.tb00081.x 2024-05-03T10:39:02Z SUMMARY Two white‐coated (ten day‐old) and two grey‐spotted (one month‐old) pups of the harp seal were implanted with electrodes for recording the electrocorticograms of the two hemispheres, electrocardiogram, electrooculogram and electromyogram of the neck muscles. In all individuals ECoG slow waves always developed synchronously in both hemispheres. When white and grey pups were recorded on the snow, the amount of active wakefulness was, respectively, 21.1% (s.e. 11.8%) and 29.9% (s.e. 0.2%) of total recording time, quiet wakefulness = 27.1% (s.e. 4.4%) and 38.2% (s.e. 6.6%), drowsiness = 7.7% (s.e. 0.5%) and 2.07% (s.e. 0.9%), light slow‐wave sleep (SWS) = 15.1% (s.e. 3.2%) and 13.0% (s.e. 2.4%), deep SWS = 21.2% (s.e. 2.4%) and 13.8% (s.e. 3.8%), paradoxical sleep (PS) = 8.0% (s.e. 1.4%) and 7.4% (s.e. 1.1%). PS always followed SWS and was fragmented. Respiration was very rare and irregular in PS and a considerable part of PS episodes occurred within a single respiratory pause. During SWS all pups displayed respiratory pauses of up to three minutes, alternating with hyperventilation periods. Heart rate was lowest in PS. Peculiarities of sleep and the pace of sleep pattern development during the first month in seals may be adaptive to the cold environment and ice field drifting in their habitat. Article in Journal/Newspaper Harp Seal Wiley Online Library Journal of Sleep Research 2 3 163 169 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
SUMMARY Two white‐coated (ten day‐old) and two grey‐spotted (one month‐old) pups of the harp seal were implanted with electrodes for recording the electrocorticograms of the two hemispheres, electrocardiogram, electrooculogram and electromyogram of the neck muscles. In all individuals ECoG slow waves always developed synchronously in both hemispheres. When white and grey pups were recorded on the snow, the amount of active wakefulness was, respectively, 21.1% (s.e. 11.8%) and 29.9% (s.e. 0.2%) of total recording time, quiet wakefulness = 27.1% (s.e. 4.4%) and 38.2% (s.e. 6.6%), drowsiness = 7.7% (s.e. 0.5%) and 2.07% (s.e. 0.9%), light slow‐wave sleep (SWS) = 15.1% (s.e. 3.2%) and 13.0% (s.e. 2.4%), deep SWS = 21.2% (s.e. 2.4%) and 13.8% (s.e. 3.8%), paradoxical sleep (PS) = 8.0% (s.e. 1.4%) and 7.4% (s.e. 1.1%). PS always followed SWS and was fragmented. Respiration was very rare and irregular in PS and a considerable part of PS episodes occurred within a single respiratory pause. During SWS all pups displayed respiratory pauses of up to three minutes, alternating with hyperventilation periods. Heart rate was lowest in PS. Peculiarities of sleep and the pace of sleep pattern development during the first month in seals may be adaptive to the cold environment and ice field drifting in their habitat. |
format |
Article in Journal/Newspaper |
author |
LYAMIN, OLEG I. OLEKSENKO, ALEXANDER I. POLYAKOVA, IRINA G. |
spellingShingle |
LYAMIN, OLEG I. OLEKSENKO, ALEXANDER I. POLYAKOVA, IRINA G. Sleep in the harp seal ( Pagophilus groenlandica). Peculiarities of sleep in pups during the first month of their lives |
author_facet |
LYAMIN, OLEG I. OLEKSENKO, ALEXANDER I. POLYAKOVA, IRINA G. |
author_sort |
LYAMIN, OLEG I. |
title |
Sleep in the harp seal ( Pagophilus groenlandica). Peculiarities of sleep in pups during the first month of their lives |
title_short |
Sleep in the harp seal ( Pagophilus groenlandica). Peculiarities of sleep in pups during the first month of their lives |
title_full |
Sleep in the harp seal ( Pagophilus groenlandica). Peculiarities of sleep in pups during the first month of their lives |
title_fullStr |
Sleep in the harp seal ( Pagophilus groenlandica). Peculiarities of sleep in pups during the first month of their lives |
title_full_unstemmed |
Sleep in the harp seal ( Pagophilus groenlandica). Peculiarities of sleep in pups during the first month of their lives |
title_sort |
sleep in the harp seal ( pagophilus groenlandica). peculiarities of sleep in pups during the first month of their lives |
publisher |
Wiley |
publishDate |
1993 |
url |
http://dx.doi.org/10.1111/j.1365-2869.1993.tb00081.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2869.1993.tb00081.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2869.1993.tb00081.x |
genre |
Harp Seal |
genre_facet |
Harp Seal |
op_source |
Journal of Sleep Research volume 2, issue 3, page 163-169 ISSN 0962-1105 1365-2869 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2869.1993.tb00081.x |
container_title |
Journal of Sleep Research |
container_volume |
2 |
container_issue |
3 |
container_start_page |
163 |
op_container_end_page |
169 |
_version_ |
1800752934927990784 |